Elastic and inelastic scattering of polarized protons from carbon-12 at 400, 600, and 700 MeV

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:7185314

Jones, K W

Good resolution cross section and analyzing power (p vector,p') data for many states in /sup 12/C up to an excitation energy of 21 MeV and spanning a momentum transfer range of 0.3 to 2.1 fm/sup -1/ were obtained using the High Resolution Spectrometer at the Clinton P. Anderson Meson Physics Facility at incident beam energies of 398, 597, and 698 MeV. Optical model potentials were obtained from the elastic scattering data. Inelastic data were analyzed in the Distorted Wave Impluse Approximation using the Love-Franey effective nucleon-nucleon interaction. The energy dependent isoscalar natural parity cross sections were underestimated, while phase difficulties were encountered in fitting analyzing powers. The energy independent isovector natural parity cross sections were reasonably reproduced, but analyzing powers were not, the calculations yielding positive trends whereas the data are of opposite sign. The energy independent isoscalar and isovector unnatural parity cross sections were quite well reproduced up to moderate momentum transfers, and striking successes were observed for some analyzing power data. An example is the success achieved in reproducing the strong negative low momentum transfer dependence of the analyzing power for the E/sub x/ = 12.71 MeV 1/sup +/; 0 state at 398 MeV. The strengths of the dominant terms in the 425 MeV force were found to be qualitatively and quantitatively well determined. A systematic lack of strength of some 20-30% in all dominant components of the 650 MeV force was observed. Systematics of energy dependence together with the results of the DWIA calculations permitted the assignment of spin, parity and isospin quantum numbers to states in the 18-21 MeV excitation region.

• Research Organization: Rutgers--the State Univ., New Brunswick, NJ (USA)
• OSTI ID: 7185314
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANALYZING POWER
ANGULAR MOMENTUM
BARYON REACTIONS
BEAMS
CARBON 12
CARBON 12 TARGET
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DISTORTED WAVE THEORY
ELASTIC SCATTERING
ENERGY DEPENDENCE
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
HADRON REACTIONS
IMPULSE APPROXIMATION
INELASTIC SCATTERING
INFORMATION
ISOSPIN
ISOTOPES
LAMPF LINAC
LIGHT NUCLEI
LINEAR ACCELERATORS
MESON FACTORIES
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
OPTICAL MODELS
PARITY
PARTICLE PROPERTIES
POLARIZED BEAMS
PROTON REACTIONS
QUANTUM NUMBERS
SCATTERING
SPIN
STABLE ISOTOPES
TARGETS
THEORETICAL DATA